<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<h1>问卷</h1>
		<h3>请选择你的专业：</h3>
		<select size="1">
			<option value="" >软件工程</option>
			<option value="">网络工程</option>
			<option value="">计算机科学</option>
			<option value="" selected="selected">信息科学</option>
			<option value="">大数据</option>
		</select>
		<h3>请选择你喜欢的小吃：</h3>
		<select multiple="multiple" size="7">
			<optgroup label="四川">
				<option value ="" >酸辣粉</option>
				<option value ="">夫妻肺片</option>
			</optgroup>
			<optgroup label="北京" >
				<option value ="" selected="selected">炸酱面</option>
				<option value ="">烤鸭</option>
			</optgroup>
		</select>
		<!-- <select name="" id="">
			<optgroup>
				<option value=""></option>
				<option value=""></option>
				<option value=""></option>
			</optgroup>
			<optgroup>
				<option value=""></option>
				<option value=""></option>
				<option value=""></option>
			</optgroup>
		</select> -->
	</body>
</html>
